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          <h1 class="post-title" itemprop="name headline">map2cloud - 映射本地端口至云端</h1>
        

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        <blockquote>
<p>很多时候，我们需要远程访问本地的服务，一般我们是借助于Teamviewer或者花生壳，而这往往需要人在对方电脑旁，还有一点，无法真正做到本机操作，体验比较差；而借助该工具就可以直接将远端服务映射到云端，我们只需要访问云端对应端口就能访问远程服务。</p>
</blockquote>
<h3 id="准备"><a href="#准备" class="headerlink" title="准备"></a>准备</h3><p>在使用该工具，你至少需要准备一下几个内容</p>
<ul>
<li>装有sshd的云端主机</li>
<li>一台装有linux系统的本地主机</li>
</ul>
<h3 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h3><h4 id="1-安装依赖工具-autossh"><a href="#1-安装依赖工具-autossh" class="headerlink" title="1. 安装依赖工具 - autossh"></a>1. 安装依赖工具 - autossh</h4><p>可以使用yum或apt-get安装<br><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment"># centos</span></span><br><span class="line">yum install autossh</span><br><span class="line"></span><br><span class="line"><span class="comment"># debain</span></span><br><span class="line">apt-get install autossh</span><br></pre></td></tr></table></figure></p>
<p>如果以上方法无法安装，则请直接到<a href="http://www.harding.motd.ca/autossh/" target="_blank" rel="noopener">autossh官网</a>，下载源码并进行安装.</p>
<h4 id="2-安装map2cloud"><a href="#2-安装map2cloud" class="headerlink" title="2. 安装map2cloud"></a>2. 安装map2cloud</h4><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">sudo curl https://raw.githubusercontent.com/smallmuou/map2cloud/master/map2cloud &gt; /usr/<span class="built_in">local</span>/bin/map2cloud</span><br><span class="line">sudo chmod +x /usr/<span class="built_in">local</span>/bin/map2cloud</span><br></pre></td></tr></table></figure>
<h4 id="3-生成rsa密钥"><a href="#3-生成rsa密钥" class="headerlink" title="3. 生成rsa密钥"></a>3. 生成rsa密钥</h4><p>请使用ssh-keygen生成密钥对</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ssh-keygen -t rsa</span><br></pre></td></tr></table></figure>
<p>PS: 一路Enter就行，会在$Home/.ssh/下生成id_rsa和id_rsa.pub</p>
<h4 id="4-开启云端sshd的GatewayPorts功能"><a href="#4-开启云端sshd的GatewayPorts功能" class="headerlink" title="4. 开启云端sshd的GatewayPorts功能"></a>4. 开启云端sshd的GatewayPorts功能</h4><p>默认情况sshd是不开启GatewayPorts，这样无法外部访问.</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">vim /etc/ssh/sshd_config </span><br><span class="line"></span><br><span class="line">GatewayPorts yes</span><br><span class="line"></span><br><span class="line">保存退出后，重启sshd</span><br><span class="line"></span><br><span class="line">service sshd restart</span><br></pre></td></tr></table></figure>
<h3 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">USAGE: map2cloud [OPTIONS] ssh-user@cloud-ip [local-ip:]local-port cloud-port</span><br><span class="line"></span><br><span class="line">DESCRIPTION:</span><br><span class="line">    ssh-user        The ssh user to access to cloud server.</span><br><span class="line">    cloud-ip        The cloud server ip or domain.</span><br><span class="line">    local-ip        The local ip to map, default is localhost.</span><br><span class="line">    local-port      The local port to map.</span><br><span class="line">    cloud-port      The port which local port to map to. note it must be an even number.</span><br><span class="line"></span><br><span class="line">OPTIONS:</span><br><span class="line">    -h              Show this help message and exit.</span><br><span class="line">    -i              Assign ssh private key path.</span><br><span class="line">    -p              Assign ssh port.</span><br><span class="line">    -n              Assign name of the service name.</span><br></pre></td></tr></table></figure>
<p>参数说明：</p>
<ul>
<li>ssh-user - 云端sshd用户</li>
<li>cloud-ip - 云端主机IP或域名</li>
<li>local-ip - 可选，本地主机IP，不填，则为localhost</li>
<li>local-port - 待映射的本地端口</li>
<li>cloud-port - 需要映射至云端的端口，必须偶数</li>
</ul>
<p>选项：</p>
<ul>
<li>-i 指定ssh私钥路径</li>
<li>-p 指定云端sshd端口，默认22</li>
<li>-n 指定本地服务名字，默认r-端口</li>
</ul>
<p>可以通过<code>map2cloud -h</code>查看详细的帮助</p>
<h3 id="例子"><a href="#例子" class="headerlink" title="例子"></a>例子</h3><ul>
<li>映射本机ssh服务端口22至云端22222</li>
</ul>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">map2cloud -i /root/.ssh/id_rsa -p 22 -n rssh root@your-cloud-ip 22 22222</span><br><span class="line">service rssh start</span><br></pre></td></tr></table></figure>
<p>PS：这样我执行要执行<code>ssh -p 22222 user@your-cloud-ip</code>，就可以访问本地主机</p>
<ul>
<li>映射192.168.12.100端口80至云端10080<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">map2cloud -n rhttp root@your-cloud-ip 192.168.12.100:80 10080</span><br><span class="line">service rhttp start</span><br></pre></td></tr></table></figure>
</li>
</ul>
<p>PS: 只需在浏览器下输入<a href="http://your-cloud-ip:10080，就可以访问本地服务" target="_blank" rel="noopener">http://your-cloud-ip:10080，就可以访问本地服务</a></p>
<h3 id="安全性"><a href="#安全性" class="headerlink" title="安全性"></a>安全性</h3><p>创建一个专门用于反向的用户</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">useradd -s /bin/<span class="literal">false</span> testxxxx</span><br></pre></td></tr></table></figure>
      
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